建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/lib/system/zephyr/condition.h

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+/*
+ * Copyright (c) 2017, Linaro Limited. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	zephyr/condition.h
+ * @brief	Zephyr condition variable primitives for libmetal.
+ */
+
+#ifndef __METAL_CONDITION__H__
+#error "Include metal/condition.h instead of metal/generic/condition.h"
+#endif
+
+#ifndef __METAL_ZEPHYR_CONDITION__H__
+#define __METAL_ZEPHYR_CONDITION__H__
+
+#include <metal/errno.h>
+#include <metal/atomic.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct metal_condition {
+	metal_mutex_t *m; /**< mutex.
+	                       The condition variable is attached to
+	                       this mutex when it is waiting.
+	                       It is also used to check correctness
+	                       in case there are multiple waiters. */
+
+	atomic_int v; /**< condition variable value. */
+};
+
+/** Static metal condition variable initialization. */
+#define METAL_CONDITION_INIT		{ NULL, ATOMIC_VAR_INIT(0) }
+
+static inline void metal_condition_init(struct metal_condition *cv)
+{
+	cv->m = NULL;
+	atomic_init(&cv->v, 0);
+}
+
+static inline int metal_condition_signal(struct metal_condition *cv)
+{
+	if (!cv)
+		return -EINVAL;
+
+	/** wake up waiters if there are any. */
+	atomic_fetch_add(&cv->v, 1);
+	return 0;
+}
+
+static inline int metal_condition_broadcast(struct metal_condition *cv)
+{
+	return metal_condition_signal(cv);
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __METAL_ZEPHYR_CONDITION__H__ */